Traffic Flow Characteristics and Lane Use Strategies for Connected and Automated Vehicles in Mixed Traffic Conditions
Traffic Flow Characteristics and Lane Use Strategies for Connected and Automated Vehicles in Mixed Traffic Conditions
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DOI：
10.1155/2021/8816540
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发表时间：
2021-01
影响因子：
2.3
通讯作者：
Zijia Zhong;Joyoung Lee;Liuhui Zhao
中科院分区：
文献类型：
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作者：
Zijia Zhong;Joyoung Lee;Liuhui Zhao
管理车道，例如互联和自动驾驶车辆（CAV）专用车道，不仅可以提供技术便利，还可以为道路使用者在不久的将来采用CAV提供所需的市场激励。在本文中，我们调查了两种配置的管理车道在不同的市场渗透率的交通流特性和量化的好处，从车道级车头时距分布，燃料消耗，通信密度和整体网络性能的角度。研究结果表明：（1）CAV专用车道显著扩展了速度-流图的稳定区域，提高了道路通行能力。结果表明，在市场渗透率为90%的情况下，一条CAV车道的最高流量为3400辆/小时/车道。(2)CAV集中在一条车道上，即使部分市场渗透，也会导致车头时距分布较窄（标准差较小）。(3)CAV专用车道还能够消除由异质交通流引起的双钟形分布。(4)专用CAV通道可创建更一致的CAV密度，从而促进通信活动并降低数据包丢失的概率。
Managed lanes, such as a dedicated lane for connected and automated vehicles (CAVs), can provide not only technological accommodation but also desired market incentives for road users to adopt CAVs in the near future. In this paper, we investigate traffic flow characteristics with two configurations of the managed lane across different market penetration rates and quantify the benefits from the perspectives of lane-level headway distribution, fuel consumption, communication density, and overall network performance. The results highlight the benefits of implementing managed lane strategies for CAVs: (1) A dedicated CAV lane significantly extends the stable region of the speed-flow diagram and yields a greater road capacity. As the result shows, the highest flow rate is 3400 vehicles per hour per lane at 90% market penetration rate with one CAV lane. (2) The concentration of CAVs in one lane results in a narrower headway distribution (with smaller standard deviation) even with partial market penetration. (3) A dedicated CAV lane is also able to eliminate duel-bell-shape distribution that is caused by the heterogeneous traffic flow. (4) A dedicated CAV lane creates a more consistent CAV density, which facilitates communication activity and decreases the probability of packet dropping.